openapi: 3.0.1
info:
  title: Dfns Approvals Signatures API
  description: 'Representative OpenAPI description of the Dfns wallet-as-a-service and MPC key-management REST API. Covers programmable non-custodial wallets, MPC keys, transfers and transactions, signature generation, the policy engine and approvals, webhooks, permissions and authentication (including User Action Signing), service accounts, and blockchain network reads.

    Authentication uses an Authorization Bearer access token (from a service account token or a user login) plus, for sensitive mutating operations, a User Action Signature obtained via the User Action Signing challenge/complete flow and passed in the X-DFNS-USERACTION header.'
  contact:
    name: Dfns Support
    url: https://www.dfns.co/
  termsOfService: https://www.dfns.co/terms-of-service
  version: '1.0'
servers:
- url: https://api.dfns.io
  description: Dfns production REST API (Europe / default)
- url: https://api.uae.dfns.io
  description: Dfns production REST API (UAE region)
security:
- BearerAuth: []
  AppId: []
tags:
- name: Signatures
  description: Raw signature generation from keys.
paths:
  /keys/{keyId}/signatures:
    post:
      operationId: generateKeySignature
      tags:
      - Signatures
      summary: Generate a signature from a key
      description: Produces a raw signature using a standalone MPC key. Requires a User Action Signature.
      security:
      - BearerAuth: []
        AppId: []
        UserAction: []
      parameters:
      - in: path
        name: keyId
        required: true
        schema:
          type: string
      requestBody:
        required: true
        content:
          application/json:
            schema:
              type: object
              required:
              - kind
              properties:
                kind:
                  type: string
                  enum:
                  - Hash
                  - Message
                hash:
                  type: string
      responses:
        '200':
          description: The signature request.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/SignatureRequest'
components:
  schemas:
    SignatureRequest:
      type: object
      properties:
        id:
          type: string
        walletId:
          type: string
        status:
          type: string
          enum:
          - Pending
          - Executing
          - Signed
          - Confirmed
          - Failed
          - Rejected
        requestBody:
          type: object
        signature:
          type: object
          nullable: true
          properties:
            r:
              type: string
            s:
              type: string
            recid:
              type: integer
            encoded:
              type: string
        dateRequested:
          type: string
          format: date-time
  securitySchemes:
    BearerAuth:
      type: http
      scheme: bearer
      bearerFormat: JWT
      description: 'Access token issued to a service account or a logged-in user. Sent as `Authorization: Bearer <token>`.'
    AppId:
      type: apiKey
      in: header
      name: X-DFNS-APPID
      description: The Dfns application (app) id the request is made on behalf of.
    UserAction:
      type: apiKey
      in: header
      name: X-DFNS-USERACTION
      description: A User Action Signature token proving the caller cryptographically signed the request payload. Required on sensitive mutating operations (transfers, signature generation, key/policy/permission changes).